Postharvest Insecticide Residues, Malathion Residues on Fruit Treated by Dipping

Postharvest Insecticide Residues, Stability of Malathion Residues in Food Processing and Storage

“…When ripe, the plant products were harvested and treated w'ith malathion in the laboratory by dipping them in a water emulsion or suspension of the pesticide. The emulsions were prepared from a 57%, emulsifiable concentrate (7) and the suspensions from a 25% commercial wettable powder formulation (5). The time elapsing between malathion application and food processing was less than 1 day.…”

“…Malathion was extracted from the plant products and residues were determined by methods described earlier (3). According to recovery tests in which stripping solutions were fortified with malathion before sample processing, the errors of this method usually remain within 10% with a standard deviation of 6.1% (3,5).…”

Postharvent Preservatives, Effect of Captan, Isopropyl N-Phenylcarbamate, Isopropyl N-(3-Chlorophenyl)carbamate, and Malathion on Keeping Quality of Plant Commodities in Storage

“…IPC and CIPC (a), and malathion (7,9 ) . O n most of the materials the amounts of chemical residues were determined at both the beginning and end of each trial.…”

“…On most of the materials the amounts of chemical residues were determined at both the beginning and end of each trial. The analytical methods have been reported for captan (70), IPC and CIPC (8), and malathion (7,9).…”

Postharvest Insecticide Residues, Extraction of Malathion Residues from Fruits

“…Malathion is removed from cottonseed by Soxhlet extraction with n-hexane (76) and from wheat with carbon tetrachloride (74). Koivistoinen and coworkers (8,10) have used benzene alone: for extracting unmacerated crops or benzene with ethanol as a blending cosolvent when the crops were macerated before extraction. Recoveries of added malathion were satisfactory with both methods.…”